Truck bolster



May 6, 1930. H. c. DREIBUSS ET :;7

TRUCK 'BCLSTEH Filed 'April 9, 1928 4 Sheets-Sheet l'" I'Nvf/VTORS: HARRX C DRE/sass GEO. 5. CH/ 5 By W 'H. c. DREIBUSS E AL 1,7 57,765

TRUCK BOLSTER May 6, I930.

' 4 Sheets-She et 2 INVENTORS. HARRY c DRE/50.55

Filed April 9, 1928 VII . 6/114 5 v I MM firroRA/EYsr May 6, 1930.

H. c. DREIBIUSS ET TRUCK BoLsTE'R Filed April 9, 1928 4 Sheets$heet 5 INVENV'OBS. HARRY C. DRE/505.5 650. 5. C/f/LES HTTORIVEKS.

May 6, 1930.

' H. c. DREIBUSS ET TRUGK BOLSTER Filed April 9, 1928 4 Sheets-Sheet 4 Patented May 6, 1930 UNITED STATE [P ATENT FicE HARRY o. DnEIBUssAnn-eEoR-Gn s. ,QHILES, or s'ri oUIs; ivi-rssounr; AssIGNoRs T0 scULLm s'rEEL-ooMrnNzor s'r. LOUIS, MISSOURI, noonrone'rion or ivrrssormr ritoox nonsrnnf Application filed April be,

This invention relates and bolsters. I

'In the conventionalrailway-car truck, the bolster has end portions of substantially the:

5 samewidth' as the spaces between the columns on the side frame of thet'ruokysolthat said 001 umns will bear against the sidewallsofthebolster and hold thebolster ina position at right angles to the longitudinal axis of the 9 truck. Endwise movement of the bolster rela- I tively to the side frames is prevented'by laterally-projecting lugs or"col"umn guides on the side walls of the bolster which embrace the columns of the side frames. Due to (the ljfact'that said lugs or oolumnguides are cast integral with the sidewalls ofthe bolster, it is the general practice to provide the side frames of the truck with relatively wide bolster-"re ceivingopenings corresponding in width 'to go the overall width of the bolster including the column guides thereon, so astopermit the bolster to be taken out of the truck by removing the bolster-supporting springs, then dropping the bloster so as to disengage the lugs torailway car trucks 7 V or guideson the sidewalls of same from the columns of the truck sideframes, and then moving the bolster endwise through the large opening in one of the sideframes; In: addition to necessitating the use of side frames n 3;; provided with very wide bolster-receiving openings, integrallugs or. column guides of the kind referred to.- add considerably to the weight of the bolster. They-also make it necessary to use very wide flasks in the op tion of casting the bolsten; V

In order to overcome the above-described objectionable characteristics of the conventional truck bolster that is nowin general use, we have devised a car truck bolster in which the bolster is guided and maintained in proper relationship with the side frames by columns on the side frames that project into 7 vertically-disposed recesses, depressions or guideways formed in the sidesof the-bolsten In such a structurethesidelframes need only be provided with bolsterreceivingopenings of substantially the same, width as the bolster, due, of course, to. the. fact that there ,are no lateral projections onthe} sidewallsof the bolster, and ano her eradrama .9 su I Ethat J the bolster columns on the side" frames :tendsto hold the upper. end *portions'of the bolster-supporting springs in properly spaced ly intolthe zone occu columns of each side frame. 7

.p ortion ofthe bolster.

view, taken: onthe'line 4+4 of'Figure 3. ,-Figure5 is atop plan view of the bolster 1928. Serial K115268533! structureis that-"the bolster, weighs less-than 3 the conventional truck bolsterprovided with laterally-projecting, lugs or, column guides. Still another advantage of such'a structure is relation, because saidcolumns proiect inwardg pied by the bolster-support1ngspr1ngs.--

The column-receiving recesses-t in the sides of the bolster may be of anypreferred crosssectionalfshape, so long as they comprise surfaces that co-operate with the columns to resist 'endwise movement 'of the bolster and maintainthe bolster in a positionat right angles'to the longitudinal axis of the truck, but

still permit the bolster to move vertically when the truck is in service. Usually, each end portion ofthe-bolster will be providedinits-t-g'i sides with vertically disposed grooves or W channels of substantially the same cross-sectional shape, and dimensions as the columns of the side frames and spaced inwardly far enough from the extreme ends of the bolster to s 75 permit bolster-supporting springs to be arranged on the outside and on the inside ofthfe -Figure 1; ofthe drawings'is aside'elevational :v1ew ofa portion of a car truck and- 80 bolster constructed in v accordance with our invention. I Y

F gure 2 isa perspective view o'f one end Figure 3'is a horizontal sectional view of one end portionwof the bolster and the columns on one-side frame that co-operate with thesame. no j" .Figure 4c is a vertical transverse sectional shown in Figure, 3, showing thepcolumns in horizontal cross section.

Figure 6' is an end view of said bolster. 5

Figures 7, 8, 9,: 10 and 11 are top plan views, illustrating various otherways of con- J structing the columns oftheside frame and the;vertically disposed recesses in the sidesof I thegbolstei' that receive-thec'oluinns; and loe so nected.

nates the springs that are arranged under theend portions of the bolsterlto support the same. Y

positioned in vertically-disposed grooves, re-

cesses or channels 1 in the sidesof'the bolster,"

In the form of our invention-shown in Figures 2 to 6, inclusive, thecolumns l) of the curved concaved surfaces that co opera'te with reversely-curved' convexedsurfaces of r the recesses 1 m the sides of the bolster, "the said recesses being located far enough-in- 'wardly from the ends of the bolster to permit each of saidgroups being arranged o'n the outside of the columns and the remaining" '25 springsof the groupbeing arranged: on the inside-of the columns, as shown in broken lines in'FigureS-S and 5. It will be noted thatthe opposed columns of each side frame-pro- ]ect inwardly'into the zone occupied by the 0 bolster sustaining springs, and that said columns are arranged intermediate springs that are located on the lnside and on the outside" of the'columns. Consequently, in such a structure the columns D of the side frames tend to hold the upper'end portions 'ofthe bolster-supporting spaced relation,

A truck bolster of the constructionv above described not only weighs less than a conventional truck bolster provided with laterally-projecting lugs or columnguides, but

'it has the added advantage that the metal of same is of substantially uniformwthick.

ness throughout'its entire area, a thing which is very desirable in a cast metal structure and which cannot be obtained in a bolster provided with heavy, laterally-projecting lugs of greater thickness than the side wallsof the bolster to which' they 7 are -inte grally qcon Thebolster' shown in Figure? embodies the V 1 same desirable characteristics and features of the bolster shown in Figures 1 to 6 and is de signed so as to permit three pairs of springs to be used to support'eachend portion of the bolster. In the bolster shown in Figure 7,

-however,,the recesses 1 in the sides of the bolster have relatively Iwide, parallel-gsurfaces an that'cO-operate. with opposed, parallel surfaces on the columns D of the side frames to; hold' the bolster at right angles to.- the 1ongitudinal: axis of the truck, and saidreeesses shave oppositely inclinedsurfaces y-that' cooperate with similarly disposed surfacesfon 1 the eolumns Itof resis't endwise novement of portions of the bolster.

slightly.

fp'airs'of end'spring's and ail-intermediate four sustaining springs to'be u'sed under-each. end portion of the bolster, two springsfof portions are designed .to' co-operate with four V springs, thecolumns D of the side frame besprings in properly 'If'd'esired, the end portionsof' the bolster,

the bolster. In such a structure the two springs constituting each pair of end springs are spaced far enough apart to permit the. columns D to project inwardly between the same and the intermediate pair of'springs are spaced close together and are arranged between the pairs of end springs, thereby per-1 V e r V c. mitting sufficient springs to be used to insure The bolsteris guided by two verticallydisposed columns ID on each SlClQflZllhQthflt are an adequate supporting mean s ufor the end Figure 8 illustrates a bolster and side'fraine columns similar to those shownin Figure 7, exceptthat the surfaces y of the recesses 1 p v 'in the sidesfofthe-bolster and the co-operatside frames are provided with reversely ing surfaces of thecolumns' D are curved InFigure 9 we have illustrated a bolster "whose end portions are designed to co-ope'rate with seven'springs arranged so as to form V group'comprisingthreesprings that are an ranged between the ,endsprings, as shown in dotted linesin said figure. In this structure the columns Dof the side frame are convex shaped in horizontalcross section, and the bolsteris provided in its sides with concaved, vertically-disposed recesses 1 that receive said columns.

i Figure lo illustrates a bolster whose end mg substantially channel-shaped in horizontal'cross section, andthe vertically-disposed recesses 1 in the sides'of the bolster which receive said columns being of similar cross-sectional shape. 7 r

' Figure 11 of the drawings illustrates a bolster of similar design to the one-shown in Figure 7-, except that the vertically-disposed recesses in the sides'of thebolster' are substantially V-shapedin cross-section,.thus providing straight, r oppositely-inclined surfaces 4 y i that 'co-op'erate with straight, oppositelyinclined surfaces Qn the' columnsD of the I side'frame to resist endwise movement of the bolster and also maintain the bolster in 7 position at right angles to the' longitudinal axis of thetruckg I which are substantially box-shapedin gen eral outline; canbercinforced and strengthened by trusses constructed so as to effectively p'reventthe top walleof thebolster from r cambering or being deflected out of shape by t V ,7

the upward thrusts which thebolster-supporting springs exert on the bottom'wall of the bolster, as described-in our pending application for patent- Serial No. 268,639yfi1ed ;April9', 1928 Theltr u sses that we prefer to' 1 125 use for tliis' purposefeach fcompris'e one or more palrs'of oppositely incl ned or diverging members 2 whose lower ends are attached 3 1 r: 1 to the bottomwallilof'the'bolster and whose T upper'endsfare-attached tojfthe to'p'wall' t of the b'ol sterf a dj'acent' the points fiwhere' said top wall is joined to the side walls 5 of the bolster, as shown clearly inFigure 4. In such a structure the upward thrusts that are exerted on'the bottom of the bolster by the springs G will be effectively taken up by the conjointaction of the top wall and side walls of the bolster. The bottom wall of the bolster V is preferably cutout or provided-with one I or more: holes, so as to reduce the weightof. l the bolster, and said holes are surrounded f either partially orcompletely by flangesor low end portion, vertically-disposed recesses in thesides'of thebolster adapted to receive the columns of the side frame, and inclined braces in the end portion ofthe bolster dis posed so as to reinforce and strengthen the recessed side walls of the bolster. v r HAR RY G. DREIBUSS.

'GEORGE S. .CHILES.

ribs 6 that project upwardly from the bottom 7 wall of the bolster and to which the lower ends of the oppositely-inclined braces or truss c members 2 are integrally connected. In a bolster of the kind shown in Figures 3 and g 5, the bottom of each endportion of'the bol- I ster is provided with a single center hole sur;

rounded by a rib 6 to 'whichthe lower ends of the diverging brace members 2"are connected, but in bolstersof the kind shown in the other figures the bottomof each end portion of the bolster is provided withtwo holes or cut out portions, each of which is partially surrounded by a rib or flange 6 to which i the lower end of one of the diverging brace and strengthen the recessed portions of the 7 side wall of thebolster that receive the col-' umns of the side frames.

Having thus described our invention, what we claim asnew and desiretosecure by Letters Patent is:

1. In a car truck,the combination ofa,

side frame, a bolster having one of its end portions positioned in an opening in said sidev frame, columns on the side frame for guiding said bolster, which are spacedapart a dis- 1 tance less thanithe width ofthe bolster, and,

supporting springs for said bolster arranged on the inside and on the outside of said col umns.

2. A car truck bolster providedwithla hollow end portion, vertically-disposed recesses c in the sides of the'bolster adaptedgto receive 7 the columns of the side frame, and a truss in said end portion disposed "so as to causeup-j ward thrusts exerted on the bottom wall of and side walls of the bolster.v v V 3. A car truck bolster provided with a hollow end portion, vertically-disposedrecesses in thesides of the bolster adaptedto receive the'bolster to be taken up bythe top .wall i the columns ofthe side frame, and a truss in' the end portion of the bolster comprising oppositely-inclined or diverging members connected at their lower ends to the bottom-wall of the bolster and at their upper ends to the top wall adj acent the sides of the bolster. A. A car truckbolster provided witha hol- 

